Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9b4cf18d8d6beeaf97d0bcacb2269bd203b8f7820934edb74c94c6da4021072c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^